Toyota Sienna Service Manual: Engine Coolant Temperature Receiver Gauge Malfunction
DESCRIPTION
The meter CPU receives engine coolant temperature signals from the ECM via the multiplex communication lines. The meter CPU displays engine coolant temperature that is calculated based on the data received from the ECM.
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT: If there is an open or short in the engine coolant temperature sensor circuit, the ECM will store the DTCs.
Perform troubleshooting of the "SFI System"
1 CHECK MULTIPLEX COMMUNICATION SYSTEM
- Check if the MULTIPLEX communication DTC is output
Result
2 PERFORM ACTIVE TEST BY INTELLIGENT TESTER
- Connect the intelligent tester to the DLC3.
- Turn the ignition switch to the ON position.
- Turn the tester ON.
- Enter the following menus: DIAGNOSIS / OBD/MOBD / METER / ACTIVE TEST.
- Check the operation by referring to the values in the table below.
METER:
OK: Needle indication is normal.
3 READ VALUE OF INTELLIGENT TESTER
- Connect the intelligent tester to the DLC3.
- Turn the ignition switch to the ON position.
- Turn the tester ON.
- Enter the following menus: DIAGNOSIS / ENGINE / DATA LIST.
- Check the values by referring to the values in the table below.
ENGINE:
4 REPLACE COMBINATION METER ASSEMBLY
OK: The operation of the combination meter assembly returns to normal.
END
Fuel Receiver Gauge Malfunction
DESCRIPTION
The meter CPU uses the fuel sender gauge assembly to determine the level of
the fuel in the fuel tank.
The resistance of the fuel sender gauge will vary between approximately 15 ] ...
Driver Side Seat Belt Warning Light does not Operate
DESCRIPTION
When turning the ignition switch to the ON position, the combination meter
assembly communicates with
the supplemental restraint system by the multiplex communication system. Unless
...
Other materials:
On-vehicle cleaning
1. INSPECT RADIATOR ASSEMBLY
(a) Check that the radiator and condenser are not
blocked with leaves, dirt, or insects. Clean the hose
connections.
If the fins are blocked, wash them with water or a
steam cleaner.
NOTICE:
If the distance between the steam cleaner and
core is ...
Manual Up / Down and Auto Down Function does not Operate on
Passenger Side Only
DESCRIPTION
If the manual UP/DOWN function does not operate, the power window motor, the
regulator switch or the
wire harness may be malfunctioning.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 CHECK WIRE HARNESS (POWER SOURCE)
Disconnect the P37 regulator switch connector.
Turn ...
ECU Power Source Circuit
DESCRIPTION
This circuit provides power to operate the theft deterrent (warning) ECU.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 INSPECT FUSE (ECU-B)
Remove the ECU-B fuse from the engine room J/B.
Measure the resistance.
Standard resistance:
Below 1 Ω
2 CHECK INSTRUMENT PANEL ...
